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Latch and return data direction.

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Albeit with no port-handling effect yet.
This commit is contained in:
Thomas Harte 2021-07-18 12:23:47 -04:00
parent 622cca0acf
commit 67d53601d5
4 changed files with 55 additions and 5 deletions
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6
Components/6526/6526.hpp
View File

@ -11,6 +11,8 @@
#include <cstdint>
#include "Implementation/6526Storage.hpp"
namespace MOS {
namespace MOS6526 {
@ -25,7 +27,9 @@ enum class Personality {
P8250,
};
template <typename PortHandlerT, Personality personality> class MOS6526 {
template <typename PortHandlerT, Personality personality> class MOS6526:
private MOS6526Storage
{
public:
MOS6526(PortHandlerT &port_handler) noexcept : port_handler_(port_handler) {}
MOS6526(const MOS6526 &) = delete;

24
Components/6526/Implementation/6526Implementation.hpp
View File

@ -18,15 +18,31 @@ namespace MOS6526 {
template <typename BusHandlerT, Personality personality>
void MOS6526<BusHandlerT, personality>::write(int address, uint8_t value) {
address &= 0xf;
printf("Unhandled 6526 write: %02x to %d\n", value, address);
assert(false);
switch(address) {
case 2: case 3:
registers_.data_direction[address - 2] = value;
break;
default:
printf("Unhandled 6526 write: %02x to %d\n", value, address);
assert(false);
break;
}
}
template <typename BusHandlerT, Personality personality>
uint8_t MOS6526<BusHandlerT, personality>::read(int address) {
address &= 0xf;
printf("Unhandled 6526 read from %d\n", address);
assert(false);
switch(address) {
case 2: case 3:
return registers_.data_direction[address - 2];
break;
default:
printf("Unhandled 6526 read from %d\n", address);
assert(false);
break;
}
return 0xff;
}

28
Components/6526/Implementation/6526Storage.hpp Normal file
View File

@ -0,0 +1,28 @@
//
// 6526Storage.hpp
// Clock Signal
//
// Created by Thomas Harte on 18/07/2021.
// Copyright © 2021 Thomas Harte. All rights reserved.
//
#ifndef _526Storage_h
#define _526Storage_h
namespace MOS {
namespace MOS6526 {
struct MOS6526Storage {
struct Registers {
uint8_t output[2] = {0, 0};
uint8_t input[2] = {0, 0};
uint8_t data_direction[2] = {0, 0};
} registers_;
};
}
}
#endif /* _526Storage_h */

2
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
View File

@ -1922,6 +1922,7 @@
4BC080D826A25ADA00D03FD8 /* Amiga.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Amiga.cpp; sourceTree = "<group>"; };
4BC080DE26A481C100D03FD8 /* 6526.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = 6526.hpp; sourceTree = "<group>"; };
4BC080E026A481C100D03FD8 /* 6526Implementation.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = 6526Implementation.hpp; sourceTree = "<group>"; };
4BC080E126A48BCC00D03FD8 /* 6526Storage.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = 6526Storage.hpp; sourceTree = "<group>"; };
4BC0CB272446BC7B00A79DBB /* OPLTests.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = OPLTests.mm; sourceTree = "<group>"; };
4BC1316D2346DE5000E4FF3D /* StaticAnalyser.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = StaticAnalyser.hpp; sourceTree = "<group>"; };
4BC1316E2346DE5000E4FF3D /* Target.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = Target.hpp; sourceTree = "<group>"; };
@ -4282,6 +4283,7 @@
isa = PBXGroup;
children = (
4BC080E026A481C100D03FD8 /* 6526Implementation.hpp */,
4BC080E126A48BCC00D03FD8 /* 6526Storage.hpp */,
);
path = Implementation;
sourceTree = "<group>";